世博轴大跨度索膜结构设计与研究  

Design and study of an long-span cable-membrane structure for the Expo Axis

作　　者：汪大绥[1] 张伟育[1] 方卫[1] 王荣[1] 丁生根[1] 高超[1] 张安安 

机构地区：[1]华东建筑设计研究院有限公司,上海200002 [2]上海世博土地控股有限公司,上海200125

出　　处：《建筑结构学报》2010年第5期1-12,共12页Journal of Building Structures

基　　金：国家科技支撑计划项目世博科技专项:世博轴及地下综合体关键技术研究(2009BAK43B06);上海市科学技术委员会科研计划项目世博科技专项:世博轴及地下综合体关键技术研究(08dz0580300)

摘　　要：世博轴及地下综合体工程是2010年上海世博会园区标志性建筑之一,其顶棚结构由阳光谷钢结构和索膜结构组成。索膜顶棚采用了连续张拉式柔性结构体系,具有大跨度、大位移、几何非线性特征较强等特点。通过研究膜材安全系数的取值、风致响应、膜面位移控制的取值方法等问题,明确了膜结构的设计原则。通过多个程序的计算分析,研究了膜材的长、短期荷载组合下的应力、变形。膜面最大应力满足设计要求,最大位移不影响建筑使用。通过结构在小风下的膜面位移分析、局部倒塌分析,论证了结构的舒适性、安全性。The Expo Axis project and its underground multi-system is the landmark building of Expo Shanghai 2010.Its roofing system is composed of cable-membrane structure and Sun Valley steel structures.The cable-membrane roof adopting the flexible structural system of continuous tensile membrane units featuring long span,large displacements and significant geometric nonlinearity.By studying the membrane material safety factor values,the wind-induced responses,the values of the membrane surface displacement control methods and other issues,the design principles of membrane structure were made clear.The membrane ＇ slong-and short-term stress and deformation under load combination were studied by calculation and analysis through multiple programs.It is shown that the maximum stress of the membrane meets the specifications and the maximum displacement does not affect the use of architectural features.In the light winds through the structure under the membrane surface displacement analysis,partial collapse analysis,the comfort and safety of the structure are demonstrated.

关 键 词：大跨度索膜结构 结构设计 有限元分析 防倒塌分析 风致响应 应力 位移 

分 类 号：TU393.3[建筑科学—结构工程] TU318